[exim] Failure to build 4.52

I know I am behind in mail but I tried to build 4.52 and got

gcc spf.c
spf.c: In function `spf_open':
spf.c:36: `SPF_server_t' undeclared (first use in this function)
spf.c:36: (Each undeclared identifier is reported only once
spf.c:36: for each function it appears in.)
spf.c:36: `spf_server' undeclared (first use in this function)
spf.c:36: invalid lvalue in assignment
spf.c:37: `SPF_DNS_CACHE' undeclared (first use in this function)
spf.c: In function `spf_close':
spf.c:46: `SPF_server_t' undeclared (first use in this function)
spf.c:46: `spf_server' undeclared (first use in this function)
spf.c:46: invalid lvalue in assignment
spf.c: In function `spf_find':
spf.c:52: `SPF_server_t' undeclared (first use in this function)
spf.c:52: `spf_server' undeclared (first use in this function)
spf.c:52: invalid lvalue in assignment
spf.c:53: `SPF_request_t' undeclared (first use in this function)
spf.c:53: `spf_request' undeclared (first use in this function)
spf.c:53: invalid lvalue in assignment
spf.c:54: `SPF_response_t' undeclared (first use in this function)
spf.c:54: `spf_response' undeclared (first use in this function)
spf.c:54: invalid lvalue in assignment
make[2]: *** [spf.o] Error 1

I sassume this means that the spf headers are out of date? The file
seems to be
33476 Sep 27 2004 /usr/local/include/spf2/spf.h

==John ffitch